TY  - SER
AU  - Acosta,Harmuth
AU  - Alván,Aldo
AU  - Hillebrandt,Axel von
AU  - Riegraf,Wolfgang
AU  - Oviedo,Martín
TI  - New contributions on sedimentology and paleontology of Chocolate and Socosani formations in Yura district, Arequipa, southern Peru
N1  - bibliogr. p. 77
ER  -